Bill aka bmann,
I read your review of the single fire adapter on CruiserCustomizing which was written a couple of months before the message written by nbissett who got his to work(see his review on adapter on CruiserCustomizing). So, this means on the C50 each cylinder has it's own coil. Now, his tach was a Baron, but he had the same problem we have. The tach was reading half of actual RPM. He was able to get his C50 working with the single fire adapter by using a 33K 1/2 watt resistor with the adapter. CrusierCustomizing says you have to use two to three 10k 1/2 watt resistors for a VTX1800 on their website.
Baron required using an adapter for their tach too, but Nick used the Drag Specialties because the Baron's was $46, the DS was $21. Anyway, below are the e-mail communications I had with Nick. I just wondered if you had solved your tach problem. My adapter should come it from DS anytime. I am hoping I have the same luck as Nick
Sent: Tuesday, August 23, 2005 10:46 PM
Subject: RE: CruiserCustomizing Member Contact
I actually have a Baron tach. I just bought the Drag Specialties adapter due
to the fact it was cheaper than the Baron adapter. The 33K 1/2 watt
resistor works great. It reads just where it should. I have a Power
Commander on my bike and when hooked to may laptop has a digital readout on
the screen of my RPM's. It is the same as my tach.
Sent: Tuesday, August 23, 2005 7:43 PM
Subject: CruiserCustomizing Member Contact
I read your review on the single fire adapter for the Drag Specialties
Minitach. My DS reads about half of what I suspect the actual RPM is. Is
the reason you bought the adapter? Does it still work and provide accurate
readings with the adapter? Did you have to change resistors later or did
the 33K 1/2 watt provide the right RPM's? I would really appreciate any
information you could provide. It seems like few people know how to get
these to read the correct revs, but its an inexpensive tach if it can be
made to work.
Thanks for your help.